<!doctype html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport"
        content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>新建文档.txt</title>
  <style>
      body, html {
          width: 100%;
          height: 100%;
          margin: 0;
          padding: 0;
          display: flex;
      }
      #noteArea {
          flex: 1;
          border: 0;
          outline: none;
          resize: none;
      }</style>
</head>
<body>
    <textarea id="noteArea"></textarea>
    <script src="index.js"></script>
</body>
</html>